Car-door-locking mechanism



I ummm@ J. lli'l. DAVIS CAR DQOR LOCKING MECHANISM Filedvoot. 25. 1922 s sheets-sheet.;

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Qd. 9', ww www@ J. H. DAVIS CAR DOOR LOCKING MECHANISM Filed oct. 25. m22 3 sheets-sheet 2 @cih 9, w23.. l wml@ l 1. H. DAx/as CAR DooRfLocmNG MEGHANISM Filed oct( 25. 1922 3 www-Sheet 3 Patented l3nt.. 9, i923.,

JAMES H. DAVIS, OF CLAIRTON, PENNSYLVANIA.

CAR-DOOR-LOCKING MECHANISM.

Application led October 25, 1922. Serial No. 596,843.

To all whom it 'may concern:

Be it known that I, JAMES H. Devis, a citizen of the United States and a resident of Clairton, in the County or2 Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Car-Door- Locking Mechanisms, of which the following is a speciiicaton` This invention relates to railway cars and more particularly to coke quenching cars adapted to receive tbc hot coke from coke ovens, and has for its object the provision of a novel door locking mechanism adapted to prevent the opening ot the discharge doors on the car, exceptat predetermined oints.

Another o ject is to provide a car ot' the class described having the novel construction and combination of parts described in the 'following specification and illustrated in the accompanying drawings, in which:

Figure l is a side elevation ot one-haltl of a car embodying this invention, partly broken awa-y for clearness. f

Figure 2 is a top plan thereof.

Figure 3 is an end elevation of the car, broken away to show the door operating mechanism.

Figure 4 is a sectional elevation, taken on the line IV--llV of Figure 1, showing the novel locking mechanism in elevation.

Referring more particularly to the drawings, the numeral 2 designates the body of the car as a whole, which is supported on trucks il and is composed of an inclined floor or bottom el, end walls 5 and side wall G, in which are doors 7 through which the material is discharged from the car.

'lhe doors 7 are adapted to be opened and closed, and also held in their respective. positions, by a door operating mechanism composed of links 8 which have one end pivotally secured to said doors and their other end pivotaily secured to one end, of arms 9 secured on a shaft l() which is provided with a gear ll in mesh with an operating rack member 1Q secured to the piston 13 of a fluid operated cylinder ll. 'lhe cylinder 14 is a two way cylinder having fluid supply pipes 15 entering each end thereof, and is controlled by the operator through valves (not shown).

'lhe links` S have their rear ends, which are pivotally connected to the arms 9, curved or bent downwardly so that when the doors 7 are fully opened or closed the pivot point connecting the links 8 and arms 9 will lie in a plane below the longitudinal axis of the shaft l0, thus forming a lock to hold the doors in either extreme.

In order to lock the doors T when not fully closed and to prevent the accidental opening of the doors 7 from any position, either due to the carelessness of the operator or to causes beyond his control, such as leaky valves, etc., the novel locking mechanism ol this invention is provided.

This mechanism comprises a ratchet wheel l? secured on the shaft l0, a rocking lever or dog lo' pivoted intermediate its ends on a bracket l2) mounted on cross beams 20 secured to the under 'frame ol' the car, and an operating lever 2l suspended from one end of the lever lo and mounted to reciprocate in guide yolcs '22 on the cross beams 20.

The lever 2l has its lower end bifurcated forming a clcvis 23 in which is mounted a roller 24 adapted to engage and ride along a raised or cam rail 25 which has its ends inclined to form appl-(niches 26.

The operation ot' this novel door locking mechanism is as Jfollows The normal weight ol the lever 2l and roller 2 is sufficient to normally )ull the rear end of the lever or dog 18 ownwardly so that its p'forward end projects upwardly into engagement with the ratchet wheel 17, and thus prevents the rotation of the shaft l0 regardless ot the power applied to the cylinder lei. As the car approaches the coke wharf or other desired discharge station the roller 2a will ride up on the rail located between the track rails at this point, thus causing the lever 2l to move upwardly and rock the lever or dog 18 away from theratchet 17 and thereby release the shaft l() so that it may' be readily rotated by the cylinder la.

rlhe advantages of locking the discharge doors of a coke quenching car will he readily appreciated by those skilled in the art. The accidental discharge of coke along the track or at the quenching racks is prevented, the discharge of hot coke and its accomlpanying dangers is prevented, and as a whole the operation of the'quenching car is facilitated and made safer.

l claim 1. ln a railway car having dischar'e doors hinged along one of their sides, t e combination with door operating mechanism including a shaft adapted to be rotated to open said doors, and means for rotating hinged along one of their sides7 the combination with door operating mechanism including a shaft adapted to be rotated to' open said doors, and means for rotating said shaft, of means for locking said shaft against rotation, and means located at a predetermined point/in the path of travel of said car adapted t0 vtri `means to Athereby release said) shaft.

' 3. In a railway ear.' having discharge doors hinged along one oftheir sides, the cornbination with door operating mechanism including a shaft adapted to be rotated to open said doors, and means for rotating said shaft, of. a ratchet on said shaft, a dog adapted to engage said ratchet to said locking.

lock said shaft against rotation, means for normally holding sald dog m' engagement With sald ratchet, and means locatedfat a predetermined point inthev path of travel to positively open and close said door, saidniechanism being adapted to lock said door only vwhen said door is fully closed7 of a second locking means adapted to lock said door against movement regardless of its position, and means located at a predetermined point in the path of travel of said car adapted to tripv said last named locking means.

In testimony whereof5 I have hereunto set my hand.

JAMES H. DAVI S. 

